Svbony SV555 54mm F4.5 Petzval APO Astrograph Lens with DSLR T-Ring
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SV555 Upgraded Astro-Camera Lens
Next-gen desensitized optical design for effortless focus and pin-sharp clarity. Integrated Petzval APO structure supports $44\text{mm}$ full-frame sensors and seamless EAF auto-focusing.
F4.5–F22 Variable Aperture
Fine-tune exposure and depth of field effortlessly. Graded click-stops prevent accidental changes, ensuring parameter stability during long exposure sequences.
Seamless Mount & Filter Integration
Rear M48x0.75 thread accepts standard 2" astro-filters. Dual Vixen/Arca-Swiss plate provides rock-solid mounting on both camera tripods and equatorial mounts.
Ultra-Stable220mm Mounting System
Multi-functional handle ensures easy carrying and accessory mounting. Extended $220mm dovetail plate allows precise balance tuning for heavy camera setups.
Versatile Day & Night Shooting
Front M72 filter thread allows easy attachment of standard camera filters. Seamlessly transition from deep-sky astrophotography to daytime telephoto shooting.
Universal M48 Threading | Fast & Secure Camera Connection
Designed with an upgraded M48 threaded mount that directly replaces traditional screw-tightening setups. It seamlessly connects to DSLR and mirrorless cameras (with matching adapter) for faster assembly, precise optical alignment, and zero wobbling during exposure.
Reversible Lens Hood | Ultra-Compact Outdoor Carrying
Features an inverted lens hood design that reverses neatly over the barrel to save essential bag space. Effortlessly pack your optic into standard camera bags for outdoor astrophotography without sacrificing front-element protection.
Verified Optical Precision | Guaranteed 0.997 Strehl Ratio
We validate every unit with individual Zygo interferometry testing before it ships, giving you factory-certified proof of optical perfection. Achieving a 0.997 Strehl ratio means maximum light throughput, needle-sharp star pinpointing, and zero guesswork about the quality of your astrophotography rig.
Apochromatic Color Control | True-to-Life Stellar Color
Precision-corrected wavelength convergence eliminates distracting purple halos and color fringing around bright stars. Enjoy ultra-clean star profiles and vibrant, natural target colors right out of the camera. 
Universal Dovetail Plate | Flexible Multi-Port Rig Integration
Equipped with standard 1/4"-20 and 3/8"-16 threads plus M6 mounting slots, allowing you to seamlessly attach guide scopes and accessories without extra adapters.
Engineered Precision Dimensions | Effortless Balancing & Rig Planning
Designed with exact physical proportions—including a 220mm base plate, 90mm front diameter, and M72 objective threads—giving you complete clarity when planning your rig. Knowing precise clearance and weight balance ahead of time ensures quick, hassle-free mounting onto any equatorial mount or photography tripod.
Complete Technical Specifications | Engineered for Professional Astrophotography
Featuring a Petzval 5-element design, 44mm full-frame image circle, and FMC optics, the SV555 delivers flat-field sharpness and versatile mounting options out of the box for effortless imaging.
SV555 Upgraded Astro-Camera Lens
Next-gen desensitized optical design for effortless focus and pin-sharp clarity. Integrated Petzval APO structure supports $44\text{mm}$ full-frame sensors and seamless EAF auto-focusing.
F4.5–F22 Variable Aperture
Fine-tune exposure and depth of field effortlessly. Graded click-stops prevent accidental changes, ensuring parameter stability during long exposure sequences.
Seamless Mount & Filter Integration
Rear M48x0.75 thread accepts standard 2" astro-filters. Dual Vixen/Arca-Swiss plate provides rock-solid mounting on both camera tripods and equatorial mounts.
Ultra-Stable220mm Mounting System
Multi-functional handle ensures easy carrying and accessory mounting. Extended $220mm dovetail plate allows precise balance tuning for heavy camera setups.
Versatile Day & Night Shooting
Front M72 filter thread allows easy attachment of standard camera filters. Seamlessly transition from deep-sky astrophotography to daytime telephoto shooting.
Universal M48 Threading | Fast & Secure Camera Connection
Designed with an upgraded M48 threaded mount that directly replaces traditional screw-tightening setups. It seamlessly connects to DSLR and mirrorless cameras (with matching adapter) for faster assembly, precise optical alignment, and zero wobbling during exposure.
Reversible Lens Hood | Ultra-Compact Outdoor Carrying
Features an inverted lens hood design that reverses neatly over the barrel to save essential bag space. Effortlessly pack your optic into standard camera bags for outdoor astrophotography without sacrificing front-element protection.
Verified Optical Precision | Guaranteed 0.997 Strehl Ratio
We validate every unit with individual Zygo interferometry testing before it ships, giving you factory-certified proof of optical perfection. Achieving a 0.997 Strehl ratio means maximum light throughput, needle-sharp star pinpointing, and zero guesswork about the quality of your astrophotography rig.
Apochromatic Color Control | True-to-Life Stellar Color
Precision-corrected wavelength convergence eliminates distracting purple halos and color fringing around bright stars. Enjoy ultra-clean star profiles and vibrant, natural target colors right out of the camera.
Universal Dovetail Plate | Flexible Multi-Port Rig Integration
Equipped with standard 1/4"-20 and 3/8"-16 threads plus M6 mounting slots, allowing you to seamlessly attach guide scopes and accessories without extra adapters.
Engineered Precision Dimensions | Effortless Balancing & Rig Planning
Designed with exact physical proportions—including a 220mm base plate, 90mm front diameter, and M72 objective threads—giving you complete clarity when planning your rig. Knowing precise clearance and weight balance ahead of time ensures quick, hassle-free mounting onto any equatorial mount or photography tripod.
Complete Technical Specifications | Engineered for Professional Astrophotography
Featuring a Petzval 5-element design, 44mm full-frame image circle, and FMC optics, the SV555 delivers flat-field sharpness and versatile mounting options out of the box for effortless imaging.
Realistic works captured with this device
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| Brand | SVBONY |
| Model | SV555 |
| Objective Type | Petzval Design（5 Elements in 3 Groups) |
| Aperture | 54mm |
| Optic Coated | FMC |
| Focal Length | 243mm |
| Focal Ratio | f/4.5-f/22 |
| Focuser | Helical |
| Image Circle | Φ 44mm (Full Frame) |
| Lockable 360º rotator | Yes |
| Mount Type | Dovetail Plate |
| Dovetail Plate Length | 184mm |
| Front Filter Thread | M72 |
| Back-end connection | M48x0.75 male thread |
| Net Weight | 2450g (excluding accessories) |
Package Includes:
- SV555 54mm f/4.5 OTA
- EAF Mount Kit
- Handle with integrated Vixen Finder saddle
- Dovetail plate with M6 threaded holes
- Camera Angle Adjuster
- 2" Filter Holder (assembled with the Lens)
- Plastic Lens Cover
- Soft Padded Case
- Instruction Manual
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